Subtropical cyclone: Difference between revisions
From Glossary of Meteorology
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<br/><div class="paragraph">They occur in regions of weak to moderate horizontal [[temperature]] gradient and extract the associated [[available potential energy]], as do [[baroclinic disturbance|baroclinic cyclones]], but they also receive some or most of their [[energy]] from convective redistribution of [[heat]] acquired from the sea, as do tropical cyclones. These storms usually have a radius of maximum [[wind|winds]] that is larger than what is observed in purely tropical systems, and their maximum sustained winds have not been observed to exceed about 32 m s<sup>−1</sup> (64 knots). Subtropical cyclones sometimes become true tropical cyclones, and likewise, tropical cyclones occasionally become subtropical storms. Subtropical cyclones in the Atlantic [[basin]] are classified by their maximum sustained surface winds: Subtropical depressions have surface winds less than 18 m s<sup>−1</sup> (35 knots), while subtropical storms have surface winds greater than or equal to 18 m s<sup>−1</sup>.</div><br/> </div><br/> | <br/><div class="paragraph">They occur in regions of weak to moderate horizontal [[temperature]] gradient and extract the associated [[available potential energy]], as do [[baroclinic disturbance|baroclinic cyclones]], but they also receive some or most of their [[energy]] from convective redistribution of [[heat]] acquired from the sea, as do tropical cyclones. These storms usually have a radius of maximum [[wind|winds]] that is larger than what is observed in purely tropical systems, and their maximum sustained winds have not been observed to exceed about 32 m s<sup>−1</sup> (64 knots). Subtropical cyclones sometimes become true tropical cyclones, and likewise, tropical cyclones occasionally become subtropical storms. Subtropical cyclones in the Atlantic [[basin]] are classified by their maximum sustained surface winds: Subtropical depressions have surface winds less than 18 m s<sup>−1</sup> (35 knots), while subtropical storms have surface winds greater than or equal to 18 m s<sup>−1</sup>.</div><br/> </div><br/> | ||
<p>''Term edited | <p>''Term edited 3 December 2021.''</p> | ||
{{TermIndex}} | {{TermIndex}} | ||
Latest revision as of 06:51, 3 December 2021
subtropical cyclone
A cyclone in tropical or subtropical latitudes (from the equator to about 50°N) that has characteristics of both tropical cyclones and midlatitude (or extratropical) cyclones.
They occur in regions of weak to moderate horizontal temperature gradient and extract the associated available potential energy, as do baroclinic cyclones, but they also receive some or most of their energy from convective redistribution of heat acquired from the sea, as do tropical cyclones. These storms usually have a radius of maximum winds that is larger than what is observed in purely tropical systems, and their maximum sustained winds have not been observed to exceed about 32 m s−1 (64 knots). Subtropical cyclones sometimes become true tropical cyclones, and likewise, tropical cyclones occasionally become subtropical storms. Subtropical cyclones in the Atlantic basin are classified by their maximum sustained surface winds: Subtropical depressions have surface winds less than 18 m s−1 (35 knots), while subtropical storms have surface winds greater than or equal to 18 m s−1.
Term edited 3 December 2021.
